21571212

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{2609}}^1$

素因数の和:2682

約数の個数: 48

約数和(自身を含む): 55248480

約数和(自身を除く): 33677268

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 53, 78, 106, 156, 159, 212, 318, 636, 689, 1378, 2067, 2609, 2756, 4134, 5218, 7827, 8268, 10436, 15654, 31308, 33917, 67834, 101751, 135668, 138277, 203502, 276554, 407004, 414831, 553108, 829662, 1659324, 1797601, 3595202, 5392803, 7190404, 10785606, 21571212]

約数ペア:

[(1, 21571212), (2, 10785606), (3, 7190404), (4, 5392803), (6, 3595202), (12, 1797601), (13, 1659324), (26, 829662), (39, 553108), (52, 414831), (53, 407004), (78, 276554), (106, 203502), (156, 138277), (159, 135668), (212, 101751), (318, 67834), (636, 33917), (689, 31308), (1378, 15654), (2067, 10436), (2609, 8268), (2756, 7827), (4134, 5218)]